CALLUM Hawkins has been ruled out for most of the season after picking up an ACL injury in training.
It's the same injury suffered by Ben Fox and means that the young goalkeeper will face a long recovery that will keep him out until at least March.
Nigel Clough said: "Callum inadverdently got injured on Monday morning in training and has done the same as Ben Fox. Doing his ACL is a massive blow for both him and us. It was innocuous again, just playing a ball. He got his knee stuck in the grass and will be out for seven months.
"We have 20 players and have two now out with long-term injuries. For two young players as well it's such bad luck for them."
Clough will be without David Templeton as well for Saturday's trip to Gillingham but hopes Richard Nartey and John-Joe O'Toole will recover from knocks.
He said: "John Joe has a sore groin and hasn't trained so far this week. It's the knock-on effect of something he had in pre-season. Richard Nartey rolled his ankle in training but should be OK for Saturday."
Templeton's hip flexor injury will keep him out for at least two more weeks.